Carburetor



"1I iiothenobject is to i provide 4afdr-ivfice'l of `Patented Sept. 9, V193() fia This "inveiiti'on` relates Yto newA and useful improvements 'if .con trolling devices, ,an d particularly to carburetlois `for internal` coin- One obje t thefinvention is to provide a i carburetor "including throttle valve, inv

which ltheiproportion offaifr, whichis inixed with the gasoline, is increased and diininished in rpre'p, ratio Ato", hefvoluine of gasoline liowing through the throttlevalve;`

this tei wherein the air admission is auteinaticall the regulati he admission of thegasoe e ,vtothefainountof gasoline. Another ob'ject is, to"`provide a ,combined throttle valve and needle valve, which are arranged,tonioveinunison., whereby to properlyproportion theair and gasoline, such throttle valve having rneans` for inoving the throttle valve in a direction to raise and lower the needle valve, such means being regulata-` ble to increase orV decrease the said movement.

Other `objects and advantages will beap parent from the following description when taken inconnection with the accompanying drawing.

In the drawing i Figure l is an' elevation of a carburetor- "iihade in accordance with the present :inven- A tion.

Figure 2 is la vertical sectional view through the carburetor. i

Figure Bis a vertical sectional `View taken in a plane at right angles to that of Figure 2.

Figure t is an elevation of the throttle valve, with fragments `of the casingV asso-` oiated therewith,showing the giooved and split portion of the said valvepvith which the screw of the casing engages.

` Referring particularly tothe accompany-` ing drawing, there is shown a cruciforni member which includes the central vertical portion l0,ifroni the opposite sides of which 4eirtend the branches 11 and 12, the former being formed for connection with an intake manifold, while the latter` is adapted toreceive air. The lower end of the verticalporition lOis formed with a bottoni wall A13, havegulateld, in" Conj unction with .0r also regulatable by hand,`

12W-Sara dissertation e thi'eadedtoreceive thereon the tube 16., A plate` lr( is disposed against the lower Aend of the ineinberlO and hasa central opening.

'receiijfing the nozzle l5 therethrough, and- Vengaged against the Vlower faceof this plate is thelupperfend of the carburetor bowl 18.l The tube 1G is disposed upwardly" through.

the bottoni of. thebowl 18, and/,is threaded `ing a central threaded' opening lll.` Screwedfl up into this opening 14 is the spray nozzle 15, the lower eiidof said nozzlebeing externally onto thesaidnoazle ldasbefore stated", the l lower end of `the tube l'being providedwith f a head 19, which engages wtli the bgottoin"V of `the bowl totightly clainp the bowl on them body 10, suitablepaclingwashers 20fand`l2l being disposed respectively between the jhead fl and bowl., andbetween the upper end" ofthe bowl and the plate, well as `betweenthe plate and the `bottoni of `thebody 10. DisposedV in the body lOis the rotatablethrottle valve body 22, said body having aperipheral l gi'oove`i23, adjacent itsupperwenchin which niention`ed spray nozzle 15.` Screwed down-` wardly throughthefupper endof the valve body ,22v Vis `the needle `valve 28, the point of whiehllies within the upper end of the spray i rl is. disposed thepacliingring `24,"and `the peripheral e groove adjacent itslowferV end, rshownl at` 25L 'In the wall'ofthe hody"` nozzle, asV clearly` seenlin the drawing. The

vupper end ofthis needle valve is provided Vwitha finger piece 29, provided with a .taili 30 `which, eiigages inltheratchetteeth 31j i forined in the upper end of the valve, l By this arrangement the needle valve "can` be ad",u v j usted i .upwardly and Y downwardly to pass into the spray nozzle to greater or lesser eXe-` tent, whereby toregulate the flow ofgasoline; from said, tube. The upper endof the yalve y `22 is .provided with a radiallyexteiiding arlinl 32` which is adapted tobe connectedwith suitable nieans for rotating thej` valve.

Tllellover end ofthevalve" Zai gutem*` e. a horizontal" plane, approximatelyone-half.e leo way through the body, such cut being made just above the lower groove 25. A second cut is made vertically in the body 22, from one end of the first cut through the bottom of the body, such second cut extending into the central opening 14, whereby a portion of the lower end of the valve body is partially separated therefrom. Disposed vertically through the valve body 22 is a screw 83, the lower end of which bears against the upper face of the free end of the partially separated portion of said body, said screw being turned down to flex said end down so that that portion of the groove 25, which is formed in the partially separated portion, is inclined with respect to the remaining portion of the groove. whereby to produce a cam action on the screw 26, to produce the vertical sliding movement of the valve simultaneously with the rotation thereof. This vertical movement of the valve causes the needle valve to move into and out of the upper end of the spray nozzle to regulate the flow of gasoline from the upper end of said tube, as the throttle valve 22 is rotated. The degree of vertical movement of the throttle valve can be regulated by means of the screw 33, which is adapted to flex the partially separated portion of the valve downwardly to greater or lesser degrees, or permit the same to fleX upwardly. Such upward and downward flexing of said portion serving to change the inclinationi of the associated portion of the groove 25, so that the distance that the valvel will slide can be regulated, and thereby the degree to which the needle valve moves into and out of the spray nozzle.

It will be understood that the gasoline in the bowl 18 llowsinto the tube 16 through the lateral openings 34, formed in said tube, and from thence rises to the upper end of the spray nozzle. to be sucked therefrom by the current or air which passes through the portion of the throttle valve.

llVhat is claimed is:

1. A carburetor including a casing, a spray nozzle. a transversely apertured throttle valve in the casing receiving the said nozzle in the aperture thereof, a needle valve car-V ried by the throttle valve and adjustable into and out of the nozzle, the throttle valve having a groove, means on the casing engaged in said groove, a portion of the grooved part of the throttle valve being partially p separated from the body of the valve and inclined with respect to the remainder of the grooved part, whereby upon rotation of the throttle valve said valve will be moved longitudinally by the casing carried means engaged in said groove to simultaneously move the needle valve into and out of the spray nozzle. Y

2. A carburetor including a. casing, a transversely apertured throttle valve rotatable in the casing, a portion of the valve being partially separated from the remainder of the valve in a spiral line, such partially separated portion having a circumferential groove, movable means for flexing said partially separated portion whereby to change the inclination of the groove, and means on the casing engaged in the groove for moving the valve longitudinally upon rotation thereof.

3. A carburetor including a casing, a transversely apertured throttle valve rotatable in the casing, an end portion of the valve being partially separated therefrom and being eXible, said partially separated portion having a circumferential groove therein, means on the casing engaged in the groove, and a threaded member in the valve engaged with the partially separated portion arranged to flex said portion whereby to vary the inclination of the groove thereof and consequently the longitudinal movement of the valve in the casing.

L A carburetor including a casing, a transversely apertured throttle valve r0- tatable in the casing and having a portion provided with an inclined circumferential groove, means on the casing engaged in the grooveA whereby to cause longitudinal movement of the valve upon rotation thereof, and means for adjusting said grooved portion whereby to change the inclination of said portion.

In testimony whereof, I aflix my signature.

BENJAMIN F. GRAVELY. 

